J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | import java.beans.EventSetDescriptor; |
| 25 | import java.beans.IndexedPropertyDescriptor; |
| 26 | import java.beans.IntrospectionException; |
| 27 | import java.beans.Introspector; |
| 28 | import java.beans.MethodDescriptor; |
| 29 | import java.beans.PropertyDescriptor; |
| 30 | |
| 31 | /** |
| 32 | * This class contains utilities useful for JavaBeans regression testing. |
| 33 | */ |
| 34 | public final class BeanUtils { |
| 35 | /** |
| 36 | * Disables instantiation. |
| 37 | */ |
| 38 | private BeanUtils() { |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Returns an array of property descriptors for specified class. |
| 43 | * |
| 44 | * @param type the class to introspect |
| 45 | * @return an array of property descriptors |
| 46 | */ |
| 47 | public static PropertyDescriptor[] getPropertyDescriptors(Class type) { |
| 48 | System.out.println(type); |
| 49 | try { |
| 50 | return Introspector.getBeanInfo(type).getPropertyDescriptors(); |
| 51 | } catch (IntrospectionException exception) { |
| 52 | throw new Error("unexpected exception", exception); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Finds a property descriptor for the class |
| 58 | * that matches the property name. |
| 59 | * |
| 60 | * @param type the class to introspect |
| 61 | * @param name the name of the property to search |
| 62 | * @return the {@code PropertyDescriptor}, {@code IndexedPropertyDescriptor} or {@code null} |
| 63 | */ |
| 64 | public static PropertyDescriptor findPropertyDescriptor(Class type, String name) { |
| 65 | PropertyDescriptor[] pds = getPropertyDescriptors(type); |
| 66 | for (PropertyDescriptor pd : pds) { |
| 67 | if (pd.getName().equals(name)) { |
| 68 | return pd; |
| 69 | } |
| 70 | } |
| 71 | return null; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Returns a property descriptor for the class |
| 76 | * that matches the property name. |
| 77 | * |
| 78 | * @param type the class to introspect |
| 79 | * @param name the name of the property to search |
| 80 | * @return the {@code PropertyDescriptor} |
| 81 | */ |
| 82 | public static PropertyDescriptor getPropertyDescriptor(Class type, String name) { |
| 83 | PropertyDescriptor pd = findPropertyDescriptor(type, name); |
| 84 | if (pd != null) { |
| 85 | return pd; |
| 86 | } |
| 87 | throw new Error("could not find property '" + name + "' in " + type); |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Returns an indexed property descriptor for the class |
| 92 | * that matches the property name. |
| 93 | * |
| 94 | * @param type the class to introspect |
| 95 | * @param name the name of the property to search |
| 96 | * @return the {@code IndexedPropertyDescriptor} |
| 97 | */ |
| 98 | public static IndexedPropertyDescriptor getIndexedPropertyDescriptor(Class type, String name) { |
| 99 | PropertyDescriptor pd = findPropertyDescriptor(type, name); |
| 100 | if (pd instanceof IndexedPropertyDescriptor) { |
| 101 | return (IndexedPropertyDescriptor) pd; |
| 102 | } |
| 103 | reportPropertyDescriptor(pd); |
| 104 | throw new Error("could not find indexed property '" + name + "' in " + type); |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Reports all the interesting information in an Indexed/PropertyDescrptor. |
| 109 | */ |
| 110 | public static void reportPropertyDescriptor(PropertyDescriptor pd) { |
| 111 | System.out.println("property name: " + pd.getName()); |
| 112 | System.out.println(" type: " + pd.getPropertyType()); |
| 113 | System.out.println(" read: " + pd.getReadMethod()); |
| 114 | System.out.println(" write: " + pd.getWriteMethod()); |
| 115 | if (pd instanceof IndexedPropertyDescriptor) { |
| 116 | IndexedPropertyDescriptor ipd = (IndexedPropertyDescriptor) pd; |
| 117 | System.out.println(" indexed type: " + ipd.getIndexedPropertyType()); |
| 118 | System.out.println(" indexed read: " + ipd.getIndexedReadMethod()); |
| 119 | System.out.println(" indexed write: " + ipd.getIndexedWriteMethod()); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Reports all the interesting information in an EventSetDescriptor |
| 125 | */ |
| 126 | public static void reportEventSetDescriptor(EventSetDescriptor esd) { |
| 127 | System.out.println("event set name: " + esd.getName()); |
| 128 | System.out.println(" listener type: " + esd.getListenerType()); |
| 129 | System.out.println(" method get: " + esd.getGetListenerMethod()); |
| 130 | System.out.println(" method add: " + esd.getAddListenerMethod()); |
| 131 | System.out.println(" method remove: " + esd.getRemoveListenerMethod()); |
| 132 | } |
| 133 | |
| 134 | /** |
| 135 | * Reports all the interesting information in a MethodDescriptor |
| 136 | */ |
| 137 | public static void reportMethodDescriptor(MethodDescriptor md) { |
| 138 | System.out.println("method name: " + md.getName()); |
| 139 | System.out.println(" method: " + md.getMethod()); |
| 140 | } |
| 141 | } |